Young inventors will have a blast with this worksheet on compound machines! Use three of the six machines together to make work easier.

Meet the master of compound machines: Rube Goldberg! His wacky contraptions put a whole new spin on the use of simple machines.

What do juice, water, and tea have in common? Compare and contrast matter in this engaging second-grade worksheet!

Is a feather liquid, soft, spotted, or heavy? Practice describing everyday objects, or matter, with this second-grade science worksheet!

Explore the applications of electrical energy with this helpful second-grade worksheet!

What makes a reptile different from an amphibian?  Learn all about animal classifications in this worksheet for second and third graders!

Learn about the texture and hardness of different objects in this second-grade worksheet!

Students flex their physical science knowledge by classifying items as solids or liquids in this fourth grade states of matter worksheet.

Discover different types of energy with this third- and fourth-grade science worksheet!

Use a seesaw to see what happens when opposing forces become balanced or unbalanced!

Gear up to go into the science lab with the help of this activity!

In this North American animal tracks worksheet, students hone their observation skills by matching tracks to animals.

Learn about the science behind one of nature's most awesome spectacles: monsoons.

Learn the ins and outs of one of the body's most important organs: the heart!

Read about one of Yellowstone National Park's coolest animals, the big horn sheep.

Learn about Red River Hogs in this series of animals facts sheets and coloring pages in one.

These "Dig It!" worksheets not only teach about life on earth, they teach the scientific method as well.

Determine which magnets have the strongest force in this third- and fourth-grade worksheet!

Learn about some of the most common forms of energy with this helpful one-pager for third graders!

What is water energy? Also known as hydro power, water energy is one of our important renewable resources!

Do you measure distance in inches or seconds? When do you use miles? Answer these and more with this third-grade worksheet about the customary system of measurement! 

Don't let your kid bark up the wrong tree! Engage him in a word search filled with tree terms, boosting his attention to detail and problem solving skills.

Dig into the past with this third-grade worksheet all about fossils!

Pull the lever on learning! Get to know one of the six simple machines with this worksheet about the lever.

The narwhal is one unusual animal! Your child will learn about this horned sea creature through text and pictures.

Learn Saturn facts with this science printable, like that it is one of the large gas planets in our solar system!

Blast off into space with a fun planet printable. This one features Jupiter, the largest planet in our solar system.

Scorpio, the scorpion, is one of the zodiac signs but you can also find him up in the stars at night!

Introduce your child to the inclined plane, one of the six simple machines that helps to make work easier for us!

Whoa, this spider is quite the spinster! He is actually one of many brand new species discovered between 2009 and 2011.